Morphological features of herbarium specimens and a living isolate of the oak wilt fungus. A, E, F, K Chalara quercina (BPI 595712, Lectotype) B, C, D, G, H, L Endoconidiophora fagacearum (FP 97476, Lectotype) I, J, M Living isolate treated as Ceratocystis fagacearum (CMW 2656 = CBS 138363, ex-epitype) A, B Dried cultures (arrow in B indicates the piece where ascomata were found) C, D Ascospores with sheaths (arrows) E–J Conidiophores K–M Conidia. Scale bars: C–J = 20 µm, K–M = 10 µm.

  Part of: de Beer ZW, Marincowitz S, Duong TA, Wingfield MJ (2017) Bretziella, a new genus to accommodate the oak wilt fungus, Ceratocystis fagacearum (Microascales, Ascomycota). MycoKeys 27: 1-19.